![](http://pdfasset.owneriq.net/3/81/381692ee-47f3-407e-bb56-9b537a52c3fc/381692ee-47f3-407e-bb56-9b537a52c3fc-bg36.png)
2 - 30 ONline Ethernet 10BASE-FB Module Installation and Operation Guide
.
Figure 2-11. Total Backbone Fault-Tolerant Configuration
Example: Fiber Network with 3 Concentrators and a Fourth
Concentrator in Full Redundancy Configuration
In Figure 2-12, three concentrators are active where Concentrator B is a
redundant concentrator for Concentrator A.